diff -ruN paps-0.6.6.orig/src/paps.c paps-0.6.6/src/paps.c
--- paps-0.6.6.orig/src/paps.c	2006-12-04 20:08:36.000000000 +0900
+++ paps-0.6.6/src/paps.c	2006-12-04 20:16:59.000000000 +0900
@@ -712,7 +712,7 @@
 	      PangoRectangle ink_rect, logical_rect;
 	      wchar_t *wtext, *wnewtext;
 	      gchar *newtext;
-	      size_t i, len, wwidth = 0, n;
+	      int i, len, wwidth = 0, n;
 
 	      wtext = (wchar_t *)g_utf8_to_ucs4 (para->text, para->length, NULL, NULL, NULL);
 	      if (wtext == NULL)
@@ -722,11 +722,17 @@
 		}
 
 	      len = wcswidth (wtext);
+	      if (len < 0)
+		{
+		  /* assuming that width of all characters in wtext may be 1 */
+		  len = wcslen (wtext);
+		}
 	      /* the amount of characters to be able to put on the line against CPI */
 	      n = page_layout->column_width / 72.0 * cpi;
 	      if (len > n)
 	        {
-		  wnewtext = g_new (wchar_t, wcslen (wtext) + 1);
+		  len = wcslen (wtext);
+		  wnewtext = g_new (wchar_t, len + 1);
 		  if (wnewtext == NULL)
 		    {
 		      fprintf (stderr, "Failed to allocate a memory.\n");
@@ -735,7 +741,14 @@
 		    }
 		  for (i = 0; i < len; i++)
 		    {
-		      wwidth += wcwidth (wtext[i]);
+		      int w = wcwidth (wtext[i]);
+
+		      if (w < 0)
+			{
+			  /* assuming that a width of this character may be 1 */
+			  w = 1;
+			}
+		      wwidth += w;
 		      if (wwidth > n)
 			  break;
 		      wnewtext[i] = wtext[i];